package jdbc;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Scanner;

/**
 * 完成用户登录功能
 * 要求用户输入用户名和密码
 * 如歌与user表中该用户信息输入一致则提供登录成功，否则提示失败
 */
public class LoginDemo {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        System.out.println("账号登录");
        System.out.println("请输入用户名:");
        String username = scan.nextLine();
        System.out.println("请输入登录密码:");
        String password = scan.nextLine();
        try (Connection connection = DBUtil.getConnection();) {
            Statement statement = connection.createStatement();
            String sql = "SELECT username,password " +
                         "FROM user " +
                         "WHERE username='"+username+"' AND password='"+password+"'";
            ResultSet rs = statement.executeQuery(sql);
            /*while (rs.next()) {
                String userName = rs.getString("username");
                String passWord = rs.getString("password");*/
            if (rs.next()) {
                System.out.println("登陆成功");
            } else {
                System.out.println("登录失败");
                }
        } catch (SQLException e) {
            throw new RuntimeException(e);
        }
    }
}
